protected function matchExtendsSingle($rawSingle, &$outOrigin)
{
$counts = [];
$single = [];
foreach ($rawSingle as $part) {
// matches Number
if (!is_string($part)) {
return false;
}
if (!preg_match('/^[\\[.:#%]/', $part) && count($single)) {
$single[count($single) - 1] .= $part;
} else {
$single[] = $part;
}
}
$extendingDecoratedTag = false;
if (count($single) > 1) {
$matches = null;
$extendingDecoratedTag = preg_match('/^[a-z0-9]+$/i', $single[0], $matches) ? $matches[0] : false;
}
foreach ($single as $part) {
if (isset($this->extendsMap[$part])) {
foreach ($this->extendsMap[$part] as $idx) {
$counts[$idx] = isset($counts[$idx]) ? $counts[$idx] + 1 : 1;
}
}
}
$outOrigin = [];
$found = false;
foreach ($counts as $idx => $count) {
list($target, $origin, ) = $this->extends[$idx];
// check count
if ($count !== count($target)) {
continue;
}
$this->extends[$idx][3] = true;
$rem = array_diff($single, $target);
foreach ($origin as $j => $new) {
// prevent infinite loop when target extends itself
if ($this->isSelfExtend($single, $origin)) {
return false;
}
$replacement = end($new);
// Extending a decorated tag with another tag is not possible.
if ($extendingDecoratedTag && $replacement[0] != $extendingDecoratedTag && preg_match('/^[a-z0-9]+$/i', $replacement[0])) {
unset($origin[$j]);
continue;
}
$combined = $this->combineSelectorSingle($replacement, $rem);
if (count(array_diff($combined, $origin[$j][count($origin[$j]) - 1]))) {
$origin[$j][count($origin[$j]) - 1] = $combined;
}
}
$outOrigin = array_merge($outOrigin, $origin);
$found = true;
}
return $found;
}